Weather Undergroundreports tornado warnings already in effect today but even more states and cities are in the danger zone.

Sunday and Monday saw five states affected by the Oklahoma City tornado as it ravaged through Oklahoma. USA Todayreports that "more than 60 million Americans are at risk of severe storms" of severe storms today primarily in Texas, Oklahoma, Arkansas, and Missouri.

There were 24 reports of tornadoes in those states on Sunday alone, and AccuWeather meteorologist Meghan Evans said Oklahoma City, Tulsa, St. Louis, Cedar Rapids, Iowa, Minneapolis, Chicago, Detroit, Dallas and Indianapolis are among the cities most at risk for severe weather Monday.